Trading Concept - Buy Low, Sell High

I believe most traders when first introduced to trading, they are taught the basic principle of Buy Low Sell High.  However, most people don't really get the essence of it especially when facing a live Forex chart.

The way I interpret this and has been practising is to continuously find my setups to buy at the lows and sell at the highs.  Of course there would be people arguing they can buy high and sell higher, sell low and buy lower.  Not wrong, as long they can consistently find their setups, and consistently trigger the trades as per their strategies.

Below is a typical setup that I would look for (for illustration only)